MC38-CT or -CC1-L cells are treated with 1 μM of DMSO, or the non-specific NG-25 or specific ALW-II-41-27 EPHA2 receptor inhibitor for indicated periods of time, followed by stimulation with EFNA1-Fc (2 μg/mL) in the last 15 min of treatments. Protein lysates are prepared and subjected to immunoblotting using antibodies to determine the effect of kinase inhibitors on EPHA2 activation.